A high-surface area activated carbon material (PPAC) prepared from a petroleum residue has been used as a host structure to promote the nucleation and growth of confined methane hydrates after the incorporation of additives. Sodium dodecyl sulfate (SDS), Leucine and Tetrahydrofuran (THF) have been evaluated either dissolved in the pre-impregnation media (ultrapure water) or incorporated in the carbon surface using a mechanochemical approach. High-pressure methane adsorption isotherms show that the mechanochemical approach does not improve the storage performance of the original carbon material due to the steric effects by the bulkier organic functionalities. Furthermore, the incorporation of the additives shifts the nucleation in narrow pores to higher pressures.

On the contrary, when the additives are dissolved in water, high-pressure methane isotherms anticipate a modification in the kinetics and/or thermodynamics of the nucleation process. Whereas gas hydrates grown in large pores and/or the external surface exhibits a significant reduction in the induction time, the nucleation process in narrow micropores becomes more uniform and occurs in a narrower pressure window, slightly shifted to higher pressures. However, no changes in the total uptake at 10 MPa could be found. The situation is different when THF is dissolved in water. In this case, the nucleation takes place at pressures below the natural process (< 3-4 MPa), the total amount of methane stored at 10 MPa being slightly limited. In-situ synchrotron X-ray diffraction studies anticipate a sI structure for the pure water methane hydrates, while a combination of sI and sII is identified for the THF-based system.

由石油残渣制备的高表面积活性炭材料（PPAC）已用作主体结构，以在掺入添加剂后促进受限的甲烷水合物的形核和生长。已评估十二烷基硫酸钠（SDS），亮氨酸和四氢呋喃（THF）是否溶解在预浸渍介质（超纯水）中或使用机械化学方法掺入碳表面中。高压甲烷吸附等温线表明，由于较大的有机官能团的空间效应，机械化学方法不能改善原始碳材料的存储性能。此外，添加剂的掺入将窄孔中的成核作用转移到更高的压力。

相反，当将添加剂溶解在水中时，高压甲烷等温线预计会改变成核过程的动力学和/或热力学。尽管在大孔和/或外表面中生长的气体水合物的诱导时间显着减少，但狭窄的微孔中的成核过程变得更加均匀，并发生在较窄的压力窗口中，略微移至较高压力。但是，在10 MPa时总摄取量没有变化。当THF溶解在水中时情况不同。在这种情况下，成核发生在低于自然过程的压力下（<3-4 MPa），在10 MPa下存储的甲烷总量受到了轻微限制。原位同步加速器X射线衍射研究预计纯净的甲烷水合物具有sI结构，